feat: Add variable to provide additional OIDC thumbprints (#1865)

Co-authored-by: Anton Babenko <anton@antonbabenko.com>

README.md

@@ -791,6 +791,7 @@ Full contributing [guidelines are covered here](https://github.com/terraform-aws
 | <a name="input_create_cni_ipv6_iam_policy"></a> [create\_cni\_ipv6\_iam\_policy](#input\_create\_cni\_ipv6\_iam\_policy) | Determines whether to create an [`AmazonEKS_CNI_IPv6_Policy`](https://docs.aws.amazon.com/eks/latest/userguide/cni-iam-role.html#cni-iam-role-create-ipv6-policy) | `bool` | `false` | no |
 | <a name="input_create_iam_role"></a> [create\_iam\_role](#input\_create\_iam\_role) | Determines whether a an IAM role is created or to use an existing IAM role | `bool` | `true` | no |
 | <a name="input_create_node_security_group"></a> [create\_node\_security\_group](#input\_create\_node\_security\_group) | Determines whether to create a security group for the node groups or use the existing `node_security_group_id` | `bool` | `true` | no |
+| <a name="input_custom_oidc_thumbprints"></a> [custom\_oidc\_thumbprints](#input\_custom\_oidc\_thumbprints) | Additional list of server certificate thumbprints for the OpenID Connect (OIDC) identity provider's server certificate(s) | `list(string)` | `[]` | no |
 | <a name="input_eks_managed_node_group_defaults"></a> [eks\_managed\_node\_group\_defaults](#input\_eks\_managed\_node\_group\_defaults) | Map of EKS managed node group default configurations | `any` | `{}` | no |
 | <a name="input_eks_managed_node_groups"></a> [eks\_managed\_node\_groups](#input\_eks\_managed\_node\_groups) | Map of EKS managed node group definitions to create | `any` | `{}` | no |
 | <a name="input_enable_irsa"></a> [enable\_irsa](#input\_enable\_irsa) | Determines whether to create an OpenID Connect Provider for EKS to enable IRSA | `bool` | `true` | no |

main.tf

@@ -156,7 +156,7 @@ resource "aws_iam_openid_connect_provider" "oidc_provider" {
   count = var.create && var.enable_irsa ? 1 : 0
 
   client_id_list  = distinct(compact(concat(["sts.${data.aws_partition.current.dns_suffix}"], var.openid_connect_audiences)))
-  thumbprint_list = [data.tls_certificate.this[0].certificates[0].sha1_fingerprint]
+  thumbprint_list = concat([data.tls_certificate.this[0].certificates[0].sha1_fingerprint], var.custom_oidc_thumbprints)
   url             = aws_eks_cluster.this[0].identity[0].oidc[0].issuer
 
   tags = merge(

variables.tf

@@ -247,6 +247,12 @@ variable "openid_connect_audiences" {
   default     = []
 }
 
+variable "custom_oidc_thumbprints" {
+  description = "Additional list of server certificate thumbprints for the OpenID Connect (OIDC) identity provider's server certificate(s)"
+  type        = list(string)
+  default     = []
+}
+
 ################################################################################
 # Cluster IAM Role
 ################################################################################